About this product: Digital Projection Alarm Clock for Bedroom, Large LED Digital Clock with 180 Projector for Bedroom, Equipped with USB Charging Port, Loud Volume, Suitable for Children, Adults and Elderly. Ultra-Clear Ceiling Projection Alarm Clock: This digital projection alarm clock is equipped with an upgraded 180 adjustable rotatable projector, which provides ultra-clear time display on the ceiling/wall, and the focusing ring can be rotated to a suitable distance of 0.5 to 3 meters (1.64 to 11.4 feet) to obtain a fine and smooth time image on the wall or ceiling. Even lying in bed, you can easily keep track of the time without touching anything. This digital alarm clock is powered by a USB power cord, allowing you to connect it to a wall outlet or portable charger. Backup battery (not included) with time memory function. In the event of a power outage, the digital clock system will continue to keep time normally, eliminating the need to reset the time and alarm after power is restored. Adjustable volume and ultra-clear 7-inch LED screen: This loud alarm clock is designed for heavy sleepers. Its 5-level adjustable volume provides a louder, more powerful alarm volume, making it easy to wake you up. This pendant clock features a 5-level adjustable brightness display, allowing you to read the time more clearly than ever on the ultra-clear 7-inch LED screen. All the setting buttons are easy to operate, making them easy for even children or the elderly.